HTML head with a self-referential canonical
The baseline every canonical audit should pass: one self-referential canonical, an indexable robots meta, matching hreflang self-reference and an og:url that agrees with all of them. For use as the comparison reference against the conflicting pages in this set.
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Trail boots | Example</title>
<link rel="canonical" href="https://www.example.com/catalog/boots">
<meta name="robots" content="index,follow">
<link rel="alternate" hreflang="en" href="https://www.example.com/catalog/boots">
<link rel="alternate" hreflang="x-default" href="https://www.example.com/catalog/boots">
<meta property="og:url" content="https://www.example.com/catalog/boots">
</head>
<body>
<h1>Trail boots</h1>
<p>Sample page. Fictional product data.</p>
</body>
</html>
Specifications
- Seed
- 70400
- Site
- example.com (fictional)
- Format
- HTML5 head fixture
- Encoding
- UTF-8
- Canonical Tags
- 1
- Self Referential
- true
- Robots
- index,follow
- Signals Agree
- true
Testing contract
Reference control- Scenario
- Extract every indexing signal from the head and check them for agreement.
- Expected result
- One canonical is found, it equals the page's own URL, robots permits indexing, and the hreflang self-reference and og:url resolve to the same URL - zero conflicts reported.
What is a .html file?
HTML (HyperText Markup Language) is the structural markup language of the web, using nested tags to define document content, semantics, and links. It is typically paired with CSS for presentation and JavaScript for behavior. It is the foundational format rendered by browsers.
How to use this file
Use an example HTML file to test parsers, DOM construction, sanitization of untrusted markup, and rendering or scraping pipelines.
How to use this file for testing
“HTML head with a self-referential canonical” is a deterministic Novus Examples fixture for Web assets, HTML parsing, Metadata testing. Favicons, web app manifests, service workers, robots and sitemap files, Open Graph images, and .well-known resources — for testing web tooling, crawlers, PWA installers, and asset pipelines.
Documented properties for this file: seed 70400 · UTF-8 · HTML5 head fixture. Compare results against paired or grouped companions on this page when present (clean↔damaged, searchable↔scanned, or format twins) so scores stay reproducible across runs.
Download the file once, keep the path stable in CI or local scripts, and treat the spec table as the contract: dimensions, seeds, field lists, and roles are intentional. Corrupt or invalid samples are labelled as such — expect parsers to fail loudly rather than silently accept them.
Web-platform fixtures are standards-compliant samples against fictional example.com data. Test crawlers, PWA installers and manifest validators, favicon/icon pipelines, service-worker registration, or .well-known parsers against the documented structure.
Related files
- htmlHTML hreflang cluster, English pageThe English member of a correct three-locale hreflang cluster: it lists itself, both translations and the x-default, and its canonical agrees. Ships with the German page so reciprocity can be verified across real files.
- htmlHTML hreflang cluster, German pageThe German member of the same cluster, with lang="de" on the html element and the identical alternate block. For testing that an audit compares the annotation set rather than the document language, and that the two agree.
- htmlHTML with deliberately invalid hreflang annotationsA deliberately invalid annotation block: `en-UK` is not a region code, `de_DE` uses an underscore, `zz` is not a language, one alternate has no hreflang attribute at all, one drops to http, there is no x-default, and the canonical points outside the cluster. For testing that every defect is reported, not just the first.
- txtdnt-policy.txt (Do Not Track compliance statement)A sample machine-discoverable Do Not Track policy of the kind served at /.well-known/dnt-policy.txt, stating retention windows, exceptions and a contact for a fictional site. For testing crawlers and privacy scanners that look for the document and read its version header.
- xmlhost-meta (XRD, XML form)Host metadata in its original XRD form: a subject, an alias, an expiry, one property, and three Link elements including an lrdd template with a {uri} placeholder. Paired with the JRD twin that carries exactly the same data.
- jsonhost-meta.json (JRD, JSON form)The JSON Resource Descriptor twin of the XRD host-meta: identical subject, alias, expiry, property and three links, expressed with lower-case JSON member names. For testing XRD-to-JRD conversion against a known answer.
Generated by generation/web_p7.py. Free for any use, no attribution required — license.